CVE-2026-62742: Windows DHCP Server Information Disclosure Vulnerability
Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
Other sources
Windows DHCP Server Information Disclosure Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9418Patch KB5120418 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9115Patch KB5120238 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26279Patch KB5120385 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23337Patch KB5120386
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62742?
CVE-2026-62742 has a medium severity score of 6.5.
What does CVE-2026-62742 affect?
CVE-2026-62742 affects multiple versions of Microsoft Windows Server and Microsoft Windows 10.
How do I fix CVE-2026-62742?
To fix CVE-2026-62742, you should apply the latest security updates provided by Microsoft for the affected software.
What type of vulnerability is CVE-2026-62742?
CVE-2026-62742 is categorized as an integer underflow vulnerability.
What can happen if CVE-2026-62742 is exploited?
If exploited, CVE-2026-62742 allows an unauthorized attacker to disclose sensitive information over an adjacent network.